The National Highway Traffic Safety Administration discovered in a new pair of studies that using marijuana before getting behind the wheel puts you at a lower risk for a car crash than drinking alcohol before driving.

The results emphasize that the amount of THC (the main active ingredient in marijuana) in a person’s body doesn’t correlate with their level of impairment like blood alcohol does, with the report’s authors pointing out that it is difficult to predict how most psychoactive drugs are absorbed and eliminated from the body since they are “chemically complex molecules,” according to the Chicago Tribune.